package 强化训练;

import java.math.BigInteger;
import java.util.Arrays;
import java.util.Scanner;

public class day27三角形 {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        BigInteger[] bigIntegers = new BigInteger[3];
        while (sc.hasNext()){
            for (int i = 0; i < 3; i++) {
                bigIntegers[i] = new BigInteger(sc.next());
            }
            Arrays.sort(bigIntegers);
            if (bigIntegers[0].add(bigIntegers[1]).compareTo(bigIntegers[2]) > 0){
                System.out.println("Yes");
            }else {
                System.out.println("No");
            }
        }
    }
}
